I’ve never owned a humidifier before but was tired of the winter months drying out my nose and my skin. This humidifier has a sleep design that is really straight forward in using. The hole where the water goes in is big enough that I can get inside and clean it. I would like the ability to fill water from the top so that I could leave the humidifier where it was and maybe use a cup to fill it back up. I wouldn’t call that a complaint, just something I would like for it to have. So far it has worked great and is helping my skin to not be nearly as dry!